公开(公告)号：WO2012166386A2

公开(公告)日：2012-12-06

申请号：PCT/US2012/038510

申请日：2012-05-18

Applicant: CIRRUS LOGIC, INC.

Inventor： KWATRA, Nitin ,  ALDERSON, Jeffrey ,  HENDRIX, Jon, D.

IPC: G10K11/178

CPC classification number: G10L21/0208 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/30231 ,  G10K2210/30391 ,  G10K2210/503 ,  H04M1/20

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.

Abstract translation: 诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其他换能器输出中以引起环境音频声音的消除。 还可以在扬声器附近提供误差麦克风以估计从噪声消除电路通过换能器的电声路径。 处理电路使用参考和/或误差麦克风，可选地与提供用于捕获近端语音的麦克风一起，通过比较其接收的信号内容来确定参考或误差麦克风中的一个是否被阻挡，并采取行动以避免产生 错误的抗噪声。

公开(公告)号：WO2015088651A1

公开(公告)日：2015-06-18

申请号：PCT/US2014/061548

申请日：2014-10-21

Applicant: CIRRUS LOGIC, INC.

Inventor： ALDERSON, Jeffrey, D. ,  HENDRIX, Jon, D.

IPC: H04R3/04 ,  G10K11/178

CPC classification number: H04R3/04 ,  G10K11/178 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  H04R2410/05

Abstract: In accordance with systems and methods of the present disclosure, a method may include receiving an error microphone signal indicative of an acoustic output of a transducer and ambient audio sounds at the acoustic output of the transducer. The method may also include generating an anti-noise signal to reduce the presence of the ambient audio sounds at the acoustic output of the transducer based at least on the error microphone signal. The method may further include generating an equalized source audio signal from a source audio signal by adapting, based at least on the error microphone signal, a response of the adaptive playback equalization system to minimize a difference between the source audio signal and the error microphone signal. The method may additionally include combining the anti-noise signal with the equalized source audio signal to generate an audio signal provided to the transducer.

Abstract translation: 根据本公开的系统和方法，一种方法可以包括接收指示换能器的声输出的误差麦克风信号和在换能器的声输出处的环境声音。 该方法还可以包括产生抗噪声信号以至少基于误差麦克风信号来减小在换能器的声输出处的环境音频声音的存在。 该方法还可以包括：通过至少基于误差麦克风信号，适应自适应回放均衡系统的响应来最小化源音频信号和误差麦克风信号之间的差异，从源音频信号产生均衡的源音频信号 。 该方法可以另外包括将抗噪声信号与均衡源音频信号组合以产生提供给换能器的音频信号。

公开(公告)号：WO2014168685A3

公开(公告)日：2014-10-16

申请号：PCT/US2014/017112

申请日：2014-02-19

Applicant: CIRRUS LOGIC, INC.

Inventor： ALDERSON, Jeffrey, D. ,  HENDRIX, Jon, D. ,  MILLER, Antonio, J. ,  KRATSAS, Robert, G. ,  AXELSSON, Jens-Peter, B. ,  ZHOU, Dayong ,  LU, Yang ,  YONG, Chin, Huang

IPC: G10K11/178

Abstract: An integrated circuit for implementing at least a portion of a personal audio device may include an output and a processing circuit. The output may provide an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer. The processing circuit may implement an adaptive noise cancellation system that generates the anti-noise signal to reduce the presence of the ambient audio sounds heard by the listener by adapting, based on a presence of the source audio signal, a response of the adaptive noise cancellation system to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the adaptive noise cancellation system is configured to adapt both in the presence and the absence of the source audio signal.

公开(公告)号：WO2013169436A2

公开(公告)日：2013-11-14

申请号：PCT/US2013/036531

申请日：2013-04-15

Applicant: CIRRUS LOGIC, INC.

Inventor： HENDRIX, Jon, D. ,  ALDERSON, Jeffrey ,  MILLER, Antonio, John ,  LU, Yang

IPC: G10K11/178

CPC classification number: G10K11/002 ,  G10K11/178 ,  G10K11/17817 ,  G10K2210/108 ,  G10K2210/3049

Abstract: A personal audio device, such as a wireless telephone, generates an anti-noise signal from an error microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise bursts are injected intermittently and the adaptation of the secondary path estimating adaptive filter controlled, so that the secondary path estimate can be maintained irrespective of the presence and amplitude of the source audio.

Abstract translation: 诸如无线电话的个人音频设备从误差麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其它换能器输出中以引起环境声音的消除。 误差麦克风也靠近扬声器提供，以提供指示噪声消除的有效性的误差信号。 二次路径估计自适应滤波器用于估计通过换能器的噪声消除电路的电声路径，从而可以从误差信号中去除源音频。 噪声突发被间歇地注入，并且二次路径估计自适应滤波器的适配被控制，使得可以维持辅助路径估计，而不管源音频的存在和幅度如何。

公开(公告)号：WO2012166273A2

公开(公告)日：2012-12-06

申请号：PCT/US2012/035815

申请日：2012-04-30

Applicant: CIRRUS LOGIC, INC.

Inventor： HENDRIX, Jon, D. ,  KAMATH, Gautham, Devendra ,  KWATRA, Nitin ,  ABDOLLAHZADEH MILANI, Ali ,  ALDERSON, Jeffrey

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K11/17827 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/30232 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3051 ,  G10K2210/3055 ,  H04R1/1083 ,  H04R3/005

Abstract: A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio and an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti- noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected.

Abstract translation: 诸如无线电话的个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从测量环境音频的参考麦克风信号和测量输出的输出的误差麦克风信号中产生抗噪声信号 传感器加上该位置的任何环境音频，并将抗噪声信号注入换能器输出，以引起环境音频声音的消除。 处理电路使用参考误差麦克风来产生抗噪声信号，该噪声信号可以由以ANC系数更新率的倍数操作的自适应滤波器生成。 下行音频可以通过插值与高数据速率的抗噪声信号组合。 控制路径中的高通滤波器减少ANC电路中的DC偏移，并且当未检测到下行链路音频时，可以停止ANC系数自适应。

公开(公告)号：WO2014158449A1

公开(公告)日：2014-10-02

申请号：PCT/US2014/016833

申请日：2014-02-18

Applicant: CIRRUS LOGIC, INC.

Inventor： HENDRIX, Jon, D. ,  ALDERSON, Jeffrey ,  ABDOLLAHZADEH, Milani, Ali ,  ZHOU, Dayong ,  LU, Yang

IPC: G10K11/178 ,  H04R3/12 ,  H04R1/10

CPC classification number: H04R1/1083 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3019 ,  G10K2210/3028 ,  H04R1/24 ,  H04R3/005 ,  H04R3/12 ,  H04R2410/05 ,  H04R2460/01

Abstract: A personal audio device including multiple output transducers for reproducing different frequency bands of a source audio signal, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each of the transducers from at least one microphone signal that measures the ambient audio to generate anti-noise signals. The anti-noise signals are generated by separate adaptive filters such that the anti-noise signals cause substantial cancelation of the ambient audio at their corresponding transducers. The use of separate adaptive filters provides low-latency operation, since a crossover is not needed to split the anti-noise into the appropriate frequency bands. The adaptive filters can be implemented or biased to generate anti-noise only in the frequency band corresponding to the particular adaptive filter. The anti-noise signals are combined with source audio of the appropriate frequency band to provide outputs for the corresponding transducers.

Abstract translation: 包括用于再现源音频信号的不同频带的多个输出换能器的个人音频设备包括自适应噪声消除（ANC）电路，该自适应噪声消除（ANC）电路从至少一个麦克风信号自适应地生成每个换能器的抗噪声信号，该麦克风信号测量 环境音频产生抗噪声信号。 抗噪声信号由单独的自适应滤波器产生，使得抗噪声信号在其相应的换能器处引起环境音频的实质消除。 使用单独的自适应滤波器提供低等待时间操作，因为不需要交叉来将抗噪声分解成适当的频带。 可以实现或偏置自适应滤波器以仅在对应于特定自适应滤波器的频带中产生抗噪声。 抗噪声信号与适当频带的源音频组合，为相应的换能器提供输出。

公开(公告)号：WO2013169453A2

公开(公告)日：2013-11-14

申请号：PCT/US2013/037049

申请日：2013-04-18

Applicant: CIRRUS LOGIC, INC.

Inventor： ALDERSON, Jeffrey ,  HENDRIX, Jon, D. ,  ZHOU, Dayong

IPC: G10K11/178

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3012 ,  G10K2210/30231 ,  G10K2210/3025 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10K2210/3226 ,  G10K2210/503 ,  H04R1/1083 ,  H04R3/00

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit that performs the adaptive noise canceling (ANC) function also detects frequency-dependent characteristics in and/or direction of the ambient sounds and alters adaptation of the noise canceling circuit in response to the detection.

Abstract translation: 诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其他换能器输出中以引起环境音频声音的消除。 还可以在扬声器附近提供误差麦克风以测量换能器的输出，以便控制抗噪声信号的适配并且估计通过换能器的噪声消除电路的电声路径。 执行自适应噪声消除（ANC）功能的处理电路还检测环境声音和/或方向上的频率相关特性，并且响应于检测改变噪声消除电路的适应。

公开(公告)号：WO2013162831A2

公开(公告)日：2013-10-31

申请号：PCT/US2013/034808

申请日：2013-04-01

Applicant: CIRRUS LOGIC, INC.

Inventor： HENDRIX, Jon, D. ,  ALDERSON, Jeffrey

IPC: G10K11/178

CPC classification number: H04R3/002 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/30391 ,  G10K2210/3055 ,  G10K2210/503

Abstract: A personal audio device including earspeakers, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each earspeaker from at least one microphone signal that measures the ambient audio, and the anti-noise signals are combined with source audio to provide outputs for the earspeakers. The anti-noise signals cause cancellation of ambient audio sounds at the respective earspeakers. A processing circuit uses the microphone signal(s) to generate the anti-noise signals, which can be generated by adaptive filters. The processing circuit controls adaptation of the adaptive filters such that when an event requiring action on the adaptation of one of the adaptive filters is detected, action is taken on the other one of the adaptive filters. Another feature of the ANC system uses microphone signals provided at both of the earspeakers to perform processing on a voice microphone signal that receives speech of the user.

Abstract translation: 包括耳式扬声器的个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从测量环境音频的至少一个麦克风信号为每个耳塞产生抗噪声信号，并且抗噪声信号与源音频 为耳机提供输出。 抗噪声信号会引起相应耳机扬声器环境声音的消除。 处理电路使用麦克风信号来产生可由自适应滤波器产生的抗噪声信号。 处理电路控制自适应滤波器的自适应，使得当检测到需要对自适应滤波器之一的自适应的动作的事件时，对另一个自适应滤波器采取动作。 ANC系统的另一个特征是使用在两个耳机中提供的麦克风信号对接收用户语音的语音麦克风信号进行处理。

公开(公告)号：WO2012166320A2

公开(公告)日：2012-12-06

申请号：PCT/US2012/037449

申请日：2012-05-11

Applicant: CIRRUS LOGIC, INC.

Inventor： KWATRA, Nitin ,  HENDRIX, Jon, D.

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K11/17833 ,  G10K2210/3017 ,  G10K2210/3037 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3213 ,  G10K2210/503

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. A processing circuit monitors a level of the anti-noise signal, determines that the anti-noise signal may cause damage to the transducer and adjusts the generation of the anti-noise signal such that damage to the transducer is prevented.

Abstract translation: 诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其他换能器输出中以引起环境音频声音的消除。 处理电路监视抗噪声信号的电平，确定抗噪声信号可能导致对换能器的损坏并调整抗噪声信号的产生，从而防止对换能器的损坏。

公开(公告)号：WO2015134617A1

公开(公告)日：2015-09-11

申请号：PCT/US2015/018742

申请日：2015-03-04

Applicant: CIRRUS LOGIC, INC.

Inventor： KALLER, Roy, Scott ,  HENDRIX, Jon, D.

IPC: H04M1/58 ,  H04M9/08

CPC classification number: H04M1/58 ,  G10L21/0364 ,  G10L2021/02082 ,  H04M1/585 ,  H04M9/08

Abstract: A personal audio device includes a sidetone circuit with one or more adjustable coefficients that generates a sidetone signal from the output of a first microphone. The sidetone circuit has one or more adjustable coefficients for altering the relationship between the first microphone signal and the sidetone signal. The personal audio device also includes a transducer for reproducing playback audio and the sidetone signal at an ear of a listener and a second microphone for measuring the output of the transducer as delivered to the ear of the listener. The sidetone circuit includes a calibration circuit for estimating a response of the second microphone to the sidetone signal and adjusting the coefficient of the sidetone circuit according to the estimated response.

Abstract translation: 个人音频设备包括具有一个或多个可调节系数的侧音电路，其从第一麦克风的输出产生侧音信号。 侧音电路具有用于改变第一麦克风信号和侧音信号之间的关系的一个或多个可调系数。 个人音频设备还包括用于再现回放音频的换能器和在收听者的耳朵处的侧音信号，以及用于测量传递到收听者的耳朵的换能器的输出的第二麦克风。 侧音电路包括校准电路，用于估计第二麦克风对侧音信号的响应，并根据估计的响应调整侧音电路的系数。